0.10.3 - Repeatedly Rumbling Ratelimiter

This hotfix fixes three small bugs with the ratelimiter:

1. The ratelimiter would sometimes crash when the connection errored out
   due to matching on an explicit crash reason whilst :gun explicitly
   advises us not to. Thanks to Brandt for the fix.
2. When a request to an endpoint with unknown ratelimit information
   (that is, the initial request) would crash due to a connection error,
   both the original request and repeated requests to said endpoint
   would hang forever. These requests are now retried after one second.
3. The same case as in 2. could happen if we hit a 429. These requests
   are now retried after five seconds